All language subtitles for Free-CCNA-DNS-Day-38-Lab-CCNA-200-301-Complete-Course_en

This is a free, complete course for the CCNA.

If you like these videos, please subscribe\n

Also, please like and leave a comment, and\n

Also, remember to sign up via the link in\n

for this course, so you can try it out yourself\n

If you want more labs like these, I highly\n

the CCNA, click the link in the video description\n

It’s a network simulator like packet tracer,\n

of these guided labs to not only help you\n

but also deepen your understanding of the\nexam topics.

I used it myself when studying for my certifications,\n

If you want to get your own copy of NetSim,\n

In this lab we will configure DNS, Domain\nName System.

DNS is used to translate easy-to-remember\n

We’ll configure R1 and these three PCs to\n

Unfortunately, the IP DNS SERVER command isn’t\n

configure R1 to act as a DNS server for the\ninternal hosts.

By the way, 1.1.1.1 is an actual DNS server\n

In the lecture video I used 8.8.8.8, Google’s\n

Of course, this is Packet Tracer, so this\n

configure 1.1.1.1 as the DNS server on your\n

In step 1 we will configure a default route\n

I thought about pre-configuring this, but\n

CONF T. And now I’ll configure the route.

IP ROUTE 0.0.0.0 0.0.0.0, and then the next\nhop is 203.0.113.2.

Let me point out that this INTERNET cloud\n

In the lab for day 1 of this course I did\n

of questions about how to add the Internet\n

Now let me check that this default route is\nworking.

I’ll try to ping the Cloudflare DNS server\n

ARP can be slow in packet tracer so one or\n

Okay now in step 2 I’ll configure PC1, PC2,\n

From the config tab, you can configure the\n

From the config tab, set the DNS server to\n1.1.1.1.

In the lecture video I mentioned that DHCP\n

like the hosts IP address, default gateway,\nand DNS server.

Notice here in packet tracer you can select\n

We’ll use static for now, but I’ll cover\n

From the config tab, set the DNS server to\n1.1.1.1.

Next in step 3 we’ll configure R1’s DNS\nserver.

We’ll also configure a host table on R1\n

so R1 will be able to ping them by name.

And let’s configure it to use 1.1.1.1 as\nwell.

Then a host entry for R1 itself.

I’ll check the host table with DO SHOW HOSTS.

And there are the hosts we configured.

I’ll try a ping to PC1 by name.

R1 has an entry in its host table for PC1,\n

Note that the IP DOMAIN LOOKUP command must\n

by default so usually you don’t need to\nconfigure it.

Finally in step 4 we will use Packet Tracer’s\n

that are sent when when PC1 pings youtube.com\nby name.

Simulation mode is enabled here in the bottom\nright.

Now I’ll go to PC1 and let’s do that ping.

Okay, so there is a DNS query message here.

Because R1 already pinged PC1, PC1 knows the\n

PC1 doesn’t need to send an ARP request.

The DNS message goes to R1, to the Internet,\n

Note that no ARP messages are needed here\neither.

R1 already pinged 1.1.1.1 before, so the ARP\n

Now that 1.1.1.1’s DNS response is back\n

From the ‘inbound PDU details’ tab, scroll\n

Youtube.com’s IP address is 172.217.6.78.

Notice PC1 has now created the ICMP message,\nthe ping.

If I click on it, you can see that the destination\n

The message goes to R1 and the Internet, but\n

message to youtube.com, because I haven’t\n

During that time PC1’s first ping fails,\n

youtube.com, and youtube.com replies.

Okay, I’ll return to realtime mode now.

If I go back to PC1, notice that the first\n

because the ARP process in Packet Tracer is\na bit slow.

Simulation mode in Packet Tracer is a great\n

For PC1 to ping youtube.com, ICMP messages\n

DNS and ARP messages were needed too.

There’s not much you need to know about\n

you understand its basic purpose and operations.

Now let’s take a look at a lab in Boson\n

Okay here's today's Boson NetSim lab preview.

The lab I have selected for today is Configuring\nDNS 1.

Boson NetSim for CCNA has four DNS labs here.

Configuring DNS 1 and 2, and then Troubleshooting\nDNS 1 and 2.

So I've selected the first one.

It has a pretty simple topology, one router,\n

Here are the commands you need to know.

Some of these we covered in the lecture video.

And some of these are NetSim specific commands,\n

IPCONFIG /DG to configure the default gateway,\n

to configure the DNS server on a PC in NetSim.

There are four tasks but for this little preview\n

So let's get started with task 1, which involves\n

On Router1 configure the host name, enable\n

Next I'll go on to Switch1 and do the same.

Okay now I'm going to configure an IP address\non Switch1.

This might be a new concept for you.

Switch1 is a Layer2 switch but I'm going to\n

So, I will cover this in more detail when\n

but Layer2 switches can have an IP address\n

the switch, so you don't actually have to\n

Anyway, I'll talk about that in a later video.

So let's configure that IP address on the\n

The IP address is 10.0.0.2 /24.

And it should be enabled by default but I'll\n

Okay next, on the PCs, configure the appropriate\n

Okay so now I'm going to use those NetSim-specific\n

IPCONFIG /IP to set the IP address.

And then to configure the default gateway\n

And then I'll do the same on PC2.

Next up, verify the IP address and subnet\n

Okay, DO SHOW IP INTERFACE BRIEF.

Okay, on FastEthernet0/0, 10.0.0.1 and it's\nUP and UP.

Now it says verify the IP address and subnet\n

mask using SHOW IP INTERFACE BRIEF.

So DO SHOW IP INTERFACE F0/0 will show us\nthat.

Okay and I'll do the same on Switch1.

But we can't see the subnet mask so I'll use DO\n

Okay so we have verified the IP address and subnet\n

Finally, in step 5 we have to verify network\n

PING 10.0.0.2, that's Switch1, looks good.

We performed the initial configurations of\n

Okay from Switch1 ping Router1 by using the\n

Does the ping succeed or fail, and why?

So, Switch1 doesn't have any DNS configurations\n

And yes, unrecognized host or address.

So Switch1 was unable to translate the host\n

Okay, and then step 2, on Router1 enable the\nDNS feature.

Sorry, the DNS server feature, that's important.

So now Router1 will respond to DNS queries\n

And let's configure those entries here in\nstep 3.

Configure Router1 with two host table entries,\n

Okay the command is IP HOST, 10.0., or sorry\n

Okay configure Switch1 to use Router1 as its\n

Okay, so to make Router1 its DNS server the\n

And to enable hostname-to-address translation,\n

Notice it's using the old version, with a\nhyphen.

So, this command should be enabled by default,\n

From Switch1 ping Router1 by using the name\n

So let's try that ping again and it should\nwork this time.

Okay, it says 'translating Router1' using\n

And then it translates it to 10.0.0.1 and\nthe pings succeed.

Okay then if we were to go on to task 3 and\n

I showed you in the lecture video what a PC\nhosts file is.

And then we would configure DNS on PC1 and\nPC2.

Okay so that's a quick look at Boson NetSim\nfor CCNA.

Boson NetSim has over 100 detailed labs like\n

So it's a really fantastic study tool for\nthe CCNA.

If you're interested, you can check out Boson\n

Before finishing today’s video I want to\n

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